大师作文网英语 关于have与have been
来源：学生作业帮 编辑：大师作文网作业帮 分类：英语作业 时间：2024/11/10 17:47:34
英语 关于have与have been
句子1 doctor have been instrumental in improving living standards in western society.
句子2 sicial factors have interplayed with one another over the past hundred years and made the middle east what it is today.
请问为什么一个是have 一个是have been?
句子1 doctor have been instrumental in improving living standards in western society.
句子2 sicial factors have interplayed with one another over the past hundred years and made the middle east what it is today.
请问为什么一个是have 一个是have been?
1) to be instrumental in sth.有助于.= 是 to be 的句型 = 医生有助于.
2）to have interplayed with 相互影响（作用）= to do 的句型 =社会因素相互影响（作用）
2）to have interplayed with 相互影响（作用）= to do 的句型 =社会因素相互影响（作用）